INTL 1101 Lecture Notes - Drip Irrigation, Land Degradation, Overgrazing
22 Jun 2014
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Annual average population growth rate: north america ~1% 2. 55 billion people in 1950s, 7. 17 billion people now. North: decreasing birth rates coinciding with increasing life expectancies aging population. South: high birth rates and low death rates with minimal modernization. Almost all growth will take place in the less developed regions. Population in 51countries expected to be lower in 2050 than in 2005. During 2005-2050 the net number of international migrants to more developed regions is projected to be ~98 million. Population growth in these regions will largely be due to international migrants (mostly to europe) If standard of living and life expectancy increase, family sizes and birth rates decline. Later ages of marriage, careers outside child rearing and domestic work, decreased need of children in industrial settings. Led to increased worry about aging populations and decreased worry about future impact of population growth. But after a certain level of development the fertility increases again.
